ROAD TEST
1. PROBLEM SYMPTOM CONFIRMATION
(a) Based on the result of the customer problem analysis, try to reproduce the symptoms. If the problem is that the transmission does not shift up or down, or that the shift point is too high or too low, conduct the following road test referring to the automatic shift schedule and attempt to duplicate the problem symptoms.
2. ROAD TEST
(a) Perform a road test.
CAUTION:
Check for safety before performing any tests.
NOTICE:
Inspection |
Procedure |
---|---|
Transmission Control Switch Test |
With the vehicle stationary and the shift lever in D, move the shift lever to S and return it to D. Check that the meter display changes from D to the appropriate S range and then back again. |
S Position Test |
With the vehicle stationary and the shift lever in S, move the shift lever to "+" and "-". Check that the meter display changes between S ranges properly. |
D Position Shift Test |
While driving the vehicle normally, check that the transmission shifts up and down through each gear properly. |
Lock-up Function |
While driving on a level surface at a constant speed in the lock-up range with the shift lever in D, lightly depress the accelerator pedal and check that the engine speed does not change abruptly. |
P Position Test |
Stop the vehicle on an incline (approximately 5° or more). Then move the shift lever to P and release the parking brake. Check that the parking lock pawl holds the vehicle in place. |
Abnormal Noise and Vibration |
Check for abnormal noise and vibration while driving the vehicle forward and backward, and during shift operations. |
Fluid Leakage |
After performing all other road test inspections, check for fluid leakage. |
HINT:
When checking for DTCs after a repair, drive the vehicle according to the monitor
drive pattern (See page ).
(b) Shift schedule confirmation
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn the Techstream on.
(4) Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle Speed, Accelerator Position and Shift Status.
(5) Check that the "Shift Status" changes in accordance with the "Vehicle Speed" as shown in the following table.
Shift Schedule Chart
Accelerator Position |
6% |
||||
---|---|---|---|---|---|
Shift Status (Shift Lever in D) |
1st to 2nd |
2nd to 3rd |
3rd to 4th |
4th to 5th |
5th to 6th |
Vehicle Speed |
5 to 15 km/h (3 to 9 mph) |
20 to 25 km/h (12 to 16 mph) |
30 to 40 km/h (18 to 25 mph) |
50 to 60 km/h (31 to 37 mph) |
60 to 70 km/h (37 to 44 mph) |
NOTICE:
(c) Lock-up confirmation
(1) Connect the Techstream to the DLC3.
(2) Turn the ignition switch to ON.
(3) Turn the Techstream on.
(4) Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle Speed, Engine Speed, Accelerator Position, SPD (NT), A/T Oil Temperature 1, Lock Up and Shift Status.
(5) When the following conditions are met, check that the difference between "Engine Speed" and "SPD (NT)" is 50 rpm or less.
Lock-up Schedule
Accelerator Position |
6% |
Vehicle Speed |
80 km/h (50 mph) or more |
Shift Status |
6th gear |
Lock Up |
ON |
HINT:
Lock-up prohibition conditions:
(d) Manual down-shift permission speed
(1) Manual down-shift is permitted for each shift status when the vehicle speed is below the corresponding range shown in the following table.
Manual Down-shift Permission Speed Chart
Shift Status (Shift Lever in S) |
S6 to S5 |
S5 to S4 |
S4 to S3 |
S3 to S2 |
S2 to S1 |
---|---|---|---|---|---|
Vehicle Speed |
240 to 255 km/h (149 to 158 mph) |
165 to 180 km/h (103 to 112 mph) |
110 to 120 km/h (68 to 75 mph) |
70 to 80 km/h (43 to 50 mph) |
35 to 40 km/h (22 to 25 mph) |
(e) Shift schedule when accelerator pedal is fully depressed
Shift Schedule Chart
Accelerator Pedal |
Fully Depressed |
||||
---|---|---|---|---|---|
Shift Status (Shift Lever in D) |
1st to 2nd |
2nd to 3rd |
3rd to 4th |
4th to 5th |
5th to 6th |
Vehicle Speed |
35 to 40 km/h (22 to 25 mph) |
75 to 85 km/h (47 to 53 mph) |
110 to 125 km/h (68 to 78 mph) |
165 to 180 km/h (103 to 112 mph) |
320 to 335 km/h (198 to 208 mph) |
Data List / Active Test
DATA LIST / ACTIVE TEST
DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing any parts. This non-intrusive
inspection can be very useful because intermittent conditions or signals may ...
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are listed in order of probability in the "Suspected Area" column of the
table. Check each sy ...
Motor Malfunction (C1427)
DESCRIPTION
DTC No.
Detection Item
DTC Detection Condition
Trouble Area
C1427
Motor Malfunction
Actuator pump motor does not operate properly.
Brake actuator assembly (Ground circuit)
Brak ...